EFFECT OF TEMPERATURE AND RELATIVE HUMIDITY ON VEGETABLE TANNED LEATHER STUDIED BY THERMAL ANALYSIS

Carsote C., Budrugeac P., Miu L., Yalçın F., Karavana H. A., Badea E.

The 5th International Conference on Advanced Materials and Systems, Bucuresti, Romanya, 23 - 25 Ekim 2014, ss.505-510

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Bucuresti
  • Basıldığı Ülke: Romanya
  • Sayfa Sayıları: ss.505-510
  • Uşak Üniversitesi Adresli: Evet

Özet

The present paper reports the results obtained by Differential Scanning Calorimetry (DSC) and Micro Hot Table method (MHT) for new vegetable tanned leathers exposed to 80°C and 80% RH for 1 to 32 days. DSC measurements were carried out both in water excess (heating rate 10 C•min-1 , temperature range 25 to 110°C), and under nitrogen flow (heating rate of 10 K•min-1 , temperature range 25 to 280°C). MHT method was used to measure the shrinkage temperature of collagen fibres. The results on hydrothermal stability obtained using these two techniques were compared. In general, collagen denaturation and shrinkage temperature decreased with time exposure, whereas the melting temperature of collagen crystalline fraction, obtained by DSC analysis in dry nitrogen flow, remained practically constant